含氟盘状液晶研究进展

Research progress of fluorine-containing discotic liquid crystals

摘要:

近年来，在分子中引入氟原子进行改性成为材料研究的热点之一。分子中引入氟原子后，可以影响其热性能、电荷输运性能以及液晶的相行为等，最终改善材料的热、光、电和磁等性质。含氟盘状液晶由于具有较高的载流子迁移率，其合成方法和性质得到了广泛的关注。在含氟盘状液晶分子的平面核上、外围侧链或桥体上取代的氟原子均能显著改变液晶的相变性质，如提升液晶相的热稳定性和柱状相的有序度等。该文综述了近十年来具有代表性的利用氟原子改性盘状液晶的研究进展，进一步证实了氟化有利于改善液晶性质，并进一步归纳了含氟盘状分子在其他领域的应用。盘状液晶氟化后所表现出的优异性能，有助于启发科研工作者在药物合成、无机材料等领域引入含氟材料。

Abstract:

In recent years, the introduction of fluorine into molecules for modification had become one of the hot topics in the field of material synthesis. After the introduction of fluorine atom, charge transport properties and liquid crystal phase behavior, and ultimately improve the thermal, optical, electrical and magnetic properties of the material. Due to its high carrier mobility, the synthesis methods and properties of fluorinated discoid liquid crystals have attracted extensive attention. It had been reported that the substituted fluorine atoms in the cores, chains and bridge positions could significantly improve the liquid crystal phase behavior, thermal stability and columnar phase order. In this paper, the progress in the modification of discotic liquid crystals by fluorine atoms in recent ten years was reviewed, which proved that fluoridation was beneficial to improve the properties of liquid crystals, and further summarized the applications of discotic molecules containing fluorine in other fields. The excellent properties of discotic liquid crystals after fluorination may inspire researchers to introduce fluorine-containing materials in the fields of drug synthesis and inorganic materials.